Factor inc/dec count methods.

src/librustc_resolve/build_reduced_graph.rs

@@ -928,7 +928,7 @@ fn build_import_directive(&mut self,
         self.unresolved_imports += 1;
 
         if is_public {
-            module_.pub_count.set(module_.pub_count.get() + 1);
+            module_.inc_pub_count();
         }
 
         // Bump the reference count on the name. Or, if this is a glob, set
@@ -963,9 +963,9 @@ fn build_import_directive(&mut self,
                 // Set the glob flag. This tells us that we don't know the
                 // module's exports ahead of time.
 
-                module_.glob_count.set(module_.glob_count.get() + 1);
+                module_.inc_glob_count();
                 if is_public {
-                    module_.pub_glob_count.set(module_.pub_glob_count.get() + 1);
+                    module_.inc_pub_glob_count();
                 }
             }
         }

src/librustc_resolve/lib.rs

@@ -749,6 +749,30 @@ fn all_imports_resolved(&self) -> bool {
     }
 }
 
+impl Module {
+    pub fn inc_glob_count(&self) {
+        self.glob_count.set(self.glob_count.get() + 1);
+    }
+    pub fn dec_glob_count(&self) {
+        assert!(self.glob_count.get() > 0);
+        self.glob_count.set(self.glob_count.get() - 1);
+    }
+    pub fn inc_pub_count(&self) {
+        self.pub_count.set(self.pub_count.get() + 1);
+    }
+    pub fn dec_pub_count(&self) {
+        assert!(self.pub_count.get() > 0);
+        self.pub_count.set(self.pub_count.get() - 1);
+    }
+    pub fn inc_pub_glob_count(&self) {
+        self.pub_glob_count.set(self.pub_glob_count.get() + 1);
+    }
+    pub fn dec_pub_glob_count(&self) {
+        assert!(self.pub_glob_count.get() > 0);
+        self.pub_glob_count.set(self.pub_glob_count.get() - 1);
+    }
+}
+
 impl fmt::Debug for Module {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         write!(f, "{:?}, kind: {:?}, {}",

src/librustc_resolve/resolve_imports.rs

@@ -407,11 +407,9 @@ fn resolve_import_for_module(&mut self,
         if resolution_result.success() {
             match import_directive.subclass {
                 GlobImport => {
-                    assert!(module_.glob_count.get() >= 1);
-                    module_.glob_count.set(module_.glob_count.get() - 1);
+                    module_.dec_glob_count();
                     if import_directive.is_public {
-                        assert!(module_.pub_glob_count.get() >= 1);
-                        module_.pub_glob_count.set(module_.pub_glob_count.get() - 1);
+                        module_.dec_pub_glob_count();
                     }
                 }
                 SingleImport(..) => {
@@ -419,8 +417,7 @@ fn resolve_import_for_module(&mut self,
                 }
             }
             if import_directive.is_public {
-                assert!(module_.pub_count.get() >= 1);
-                module_.pub_count.set(module_.pub_count.get() - 1);
+                module_.dec_pub_count();
             }
         }